I read somewhere that mosquitoes invaded Finland recently, for the first time in the county's history, and this ecological anomaly is attributed to climate change. I wonder if it's also responsible for bringing the flies through your windows. Good effort you made with the photos.
Turns out I hate all vermin, especially flies and cockroaches. I wouldn't photograph them if I saw them in my home, I would simply smash the hell out of them. These nauseating creatures carry deadly diseases.
This is definitely fake news. Mosquitoes have always been here. The land is full of swamps and while the winter has zero, the summer is thick with them.